DEFECT WELD
(VISUAL)
UNDERCUT
UNDERCUT
Because
1. Temperature metal too high .
2. Ampère capping high .
3. Speed capping too low
Result
1. Weaken connection.
2. Started rust the surface.
3 .Cause voltage sliding ( displacement stress ) potential to crack .
Countermeasures :
1. Enough clean up with wire brush and filling it with stringer ( welding lane single without swing according wps repair.
Rejection criteria :
1. The depth of more than 1/32 “or more than12 ½ % thick nominal material.
2. The depth of more than 1/64” to 1/32 “or more than 6% to 12 ½ % thick nominal material.
3. A length of more than 2 “ in 12 “ Welds or more than 1/6 length weld.
4. ROOT UNDER CUT more than 2” in 12 “ ROOT or more than 1/4 length ROOT .
0 komentar:
Post a Comment